Equation 1: 3x + 2y + 4z = 12 Equation 2: x + y + 2z = 6
Substituting x = 0, y = 4 and z = 1 into equation 1 and equation 2 and if the answer equals to 12 and 6 then the two lines intersect at the given point
We have the answer of 12 and 6, hence the two lines intersect at the given point -------------------------------------------------------------------------------------------------------------